Pencil-lengthener.



W. ROBINSON.

PENCIL LENGTHENER.

APPLICATION FILED JUNE 30, 1915.

1,186,040. Patented June (x1916.

IN VE/V TOR ATTORNEY UNITED STATES PATENT OFFICE.

WILLIAM ROBINSON, OF NEW YORK, N. Y., ASSIGNOR 'IO EBERHARD FABER PENCIL COMPANY, OF BROOKLYN, NEW YORK, A CORPORATION OF NEW YORK.

PENCIL-LENGTHENER.

Specification of Letters Patent.

Patented June 6, 1916.

Application filed June 30, 1915. Serial No. 37,140.

To all whom it may concern:

Be it known that I, IVILLIAM ROBINSON, a citizen of the United States, residing in the borough of Brooklyn, county of Kings, city and State of New York, have invented certain new and useful Improvements in Pencil-Lengtheners, of which the following is a specification.

My invention .relates to devices whereby a lead pencil may still be used conveniently after its length has been reduced to a short stub. Vith this end in view, it comprises a ferrule or short sleeve, split longitudinally, and a tube of metal or other suitable material, as celluloid or hard rubber, the ferrule being slipped over the pencil and the tube being forced partway over the ferrule. The ferrule is pressed to shape to provide arched portions or protuberances which are closely engaged by the inner surface of the tube when the latter is forced over the same, inwardly directed beads or portions of the ferrule being forced, by the engagement of the arched portions of the ferrule with the tube. into binding engagement with the surface of the pencil. An outwardly extending beador abutment is also provided on the ferrule, which is contacted by the end of the tube when the latter has been forced over the arched portions of the ferrule or some of the same, to prevent further movement of the tube in the direction in which the tube has been forced.

In order that a clearer understanding of my invention may be had, attention is hereby'directed to the accompanying drawings forming part of this application and illustrating a preferred embodiment of my invention.

In the drawings, Figure 1 represents a side elevation of my improved device applied to a pencil, Fig. 2 is an enlarged partial elevation of the same, the tube being shown in section, Fig. 3 is a central longitudinal section corresponding to Fig. 2, and Figs. 4 and 5 are cross-sections taken respectively on lines 44 and 55 of Fig. 3.

Referring to the drawings, the tube 1, preferably of thin metal, constitutes a pencil lengthener and may, if desired, have an eraser 2- inserted in its outer end. Its other end is forced over the ferrule 3 which is shown mounted upon the pencil 4. The ferrule is a shortsleeve of thin resilient material split longitudinally as shown and pressed to shape as will be described. At each end portion the metal or other material of the ferrule is arched slightly in the direction of its length, as shown at 5, 5, inwardly directed beads or corrugations 6, 6 separating the end arched portions or protuberances 5, 5 from the central arched portion'7, peripheral bead or rib 8 extending outwardly from portion 7 around the central or highest portion of the arch 7. When the tube 1 is forced into position, as shown in Figs. 2 and 3, it rides over the adjacent arched portion 5, at the end of the ferrule, and the arched central portion 7, until the end of the tube comes/into contact with the rib 8 which stops the further advance of the tube. The inner diameter of the tube is slightly less than the outer diameters of portions 5 and T of the ferrule when the latter are not compressed, so that the result of forcing the tube onto the ferrule is to force the nearest inwardly directed portion 6 of the ferrule and the inwardly directed end of the portion 5, which is passed over by the tube, into binding engagement with the wood of the pencil, while the portions 5 and 7 ofthe ferrule engaged by the tube are pressed tightly into contact therewith. Since the central portion 7 of the ferrule is of arched construction, the engagement of the tube with the same on one side of the central rib 8 also causes the inwardly directed bead 6 on the other side of rib 8 to bite into the Wood of'the pencil as shown. The tube 1 is positioned by rib. 8 with respect to the ferrule, the pencil, ferrule and tube being firmly secured together in such manner as to prevent any slipping between the parts when pressure is applied to the tube or ferrule in using the pencil. At'the same time the parts may very readily be separated by pulling the tube off the ferrule after which the latter may easily be slipped off the stump of the pencil.

Having now described my invention, what I claim as new therein and desire to secure by Letters Patent is as follows:

1. In a device of the character described, the combination of a split sleeve of thin resilientinaterial. adapted to be slipped over a lead pencil to any desired position and having a central outwardly arched portion and inwardly-bent beads on both sides thereof. said portion and beads extending peripherally. and a second arched portion between one of said beads and an end of the sleeve;

and a tube of such diameter as to be adapted to be pushed over said last-named arched portion and onto said central arched portion, to force both said inwardly-bent beads into binding contact with the pencil, subrule, and inwardly directed portions between i said end and central arched portions, said arched portions being adapted to be closely engaged by the inner surface of the tube, if the latter is slipped over the same, and said rib being adapted to contact the end of said tube to prevent further. movement thereof, when said tube is forced over one end of the ferrule, substantially as set forth.

This specification signed and witnessed this 28th day of June, 1915.

' WILLIAM ROBINSON;

Witnesses F. G. FABER, (jifl- SIEBERT. 

